I would for sure go to something larger than 60lb to reach 400 , I also agree that larger Inj with a good tune should idle and drive like a new stock Focus , I ran 96lb and it idled and drove perfectly

From the personal experience I have with the available injectors for the SVT, the Seimens 60lb, narrlow cone injectors do not idle as well as the previous Bosch 42lb units. The 42lb injs have a wider cone angle that seems to help...but they are much louder than the stock or the 60lb injs.
The injector characteristics have a large influence on engine operation.
With a wider cone angle, some transient events may trend lean.

If you looking for injectors or have any questions you can email my buddy Andrew atandrew@fuelinjectordevelopment.com and he can get you some awesome injectors and the quality is amazing. He is very knowledgeable and an awesome guy to talk to.
Otherwise there web site is fuelinjectordevelopment.com if you want to look like them.

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